Abstract:
Carbon monoxide oxidation (CO oxidation) was used to reduce the amount of CO that is poison to the proton exchange membrane (PEM) fuel cells by using zeolite-A loading gold and platinum, as catalyst. The catalysts were successfully synthesized by using fumed silica, aluminium hydroxide, and various types of alkaline species, namely lithium (Li), sodium (Na), and potassium (K) hydroxides, via sol-gel process and microwave heating technique. After loading with different types of metal via impregnation method, Na-A zeolite loading platinum showed higher CO conversion than gold loaded Na-A zeolite. The highest conversions of platinum and gold loadings were 100 and 26%, respectively. In addition. all of the alkaline-A zeolites showed slightly different conversion for CO oxidation and reached 100% at 240 ℃. Moreover, the conversion for the CO oxidation. It reached the highest conversion of 89% at 240 ℃ and dropped at higher temperature.
